Brake relining machine



Oct. 11, 1932. H. B.l BARRETT BRAKE RELINING MACHINE Filed June 19, 1930 .latentecl @et lll, 1932 niairt- 'artnr cria I p BRAKE RELINING MACHINE application med June A1e,

This invention relates to machines and devices for performing brake rellnlng operations. Y p

The invention has for an object the provision of a brake relining machine which combines several operative units, to the end that separate machines for performing a relining operation are unnecessary.

Another object is the provision of a brake relining machinewhich is compact and in which all necessary units are closely grouped, to the end that an operator may perform a better brake relining operation and with a minimum of timeand labor expended.

l. llrnother object is the provision of a brake relining machine which is so constituted and arranged as to allow for proper boring' of holes or openings in the brake lining relative to the brake shoe or band.

Another object is the provision of a brake relining machine adapted to drill and countersinlr the hralie'lining, at the same time finishing the edge of the countersunk portion without leaving said edge frayed.

Another object is the'provision of a brake lining'machine having means for accurately determining the position of drilling and counteisinlringv the brake lining relative to the brake shoe.

it the present time, it is an exceedingly difficult matter, say, for a skilled operator, to accurately determine the position of a hole being bored through a lining and especially a channel or U-shaped band or shoe. With my invention, however, I have provided suitable means whereby an unskilled operator may hold the lining in position relative to the channel shaped shoe and accurately determine without watching the drill or ref' quiringH special measurement, the exact position at which lthe hole should be bored through theA lining relative to the shoe or band.

ln practicing the invention, 'I have proided a novel form of drill, in the present in stance 'having three portions, namely, a re-` movable central drill, a concentric annular countersunk type` drill, and a further conprcvided with teeth having 1930. Serial N0. 462,269.

tioned relative to the brake band or shoe, the first drill will form the hole, the second drill Will countersink around the first hole so formed, and the rounded teeth will smooth the lining at the countersunk portions. I have also combined a resiliently swingable pointer which lies in the same axis with the first drill mentioned. This swingable pointer acts separately connected with channel or U-shaped shoes to show the operator the exact position that a hole will be bored through the lining relative to the brake shoe or band. The linger member being resiliently swingable, allows the operator to force the shoe into position and out of position at will, la feature that could not be aecomplishedif the pointer was not so bendable and swingable Thus, by providing a resiliently bendable'and swinga'blel pointer, it is possible to accurately and quickly position the shoe and brake lining..

The invention has for a further object, the provision of a brake relining machine which is simple in structure, inexpensive ofmanufacture, and generally superior.

With the above and other objects in view, the invention consists in the novel and useful provision, formation, construction, association and relative arrangement of parts, members and features, all as shown in a certain embodimentv in the accompanying drawing, described generally, and more particularly pointed out inthe claims.

In thedrawing :Y

Fig.l is aside elevational view of a brake relining machine embodying my invention, with parts of said machine broken away and in section,

Fig. 2 is a sectional view through the upper portion of vthe drilling, countersinking and finishing unit and through the lower end ofv the flexible guide or pointer for locating the position of the drill,

Fig. 3 is a section taken lengthwise through the center of the combined drilling, countersinlring and edge finishing unit,

Fig. 4 is an elevational view of thelower end of the rivet opening member, and,

v Fig. v is an elevational viewof the riveting plunger. v

Referring by numerals to the accompanying drawing which illustrates a practical embodiment of my invention, 10 designates a suitable base and projecting upwardly therefrom is a post or standard 11 and secured on the upper end of said standard is a bracket 12 v internally threaded for the receptienof the threaded shank of a screw 18,. Thebearingfor member 17 is lubricated by means of a suitably located greasecup 16.

j Interposed between'the head of the screw 18'and the lower end of tubular member 17 is an expansive springV 19 which functions to retain the screw in its adj ustedposition vand preventaccidental unscrewing of the same as a result of vibration while the machine is in operation. j f n Removably arranged within tubular mem'- ber 17, above screw A18, is a rod 20. rPhe upper end of the wall of tubular member 17 is notched to form a plurality of teeth 2 1 and the upper ends thereof are rounded in order to make rubbing Contact with the under'face of the brake lining when the machine is in service, yand thereby finish the edge of the countersink that is formed around the v opening in said brakev lining'.

Removably positioned in the upper portion of tubularmember 17 and resting on the upper end of rod 20 is a tubularmember 22, the.

upper end Vof which is notched to form a series of countersinl; cuttingteeth 23.

rvRemovably positioned within the tubular member 22 and projecting beyond the teeth 23, isa drill 24, the lower end of which rests on rod20. 1 n

The wall'of tubular member 22 is cut away on one side ofthe lower portion to'fform an opening 25 that exposes the lower portion of the drill 24 and a set screw 26passes through the upperportion of tubular member. 17 and bears against that portionv of .the drill 24 that is exposed in opening 2 5.` When thisl set screw is tightened the drill 24 and tubular member 22 are securely clamped in the upper portion Yof tubular vmember v17.

Removably mounted onV the intermediate portion of tubular member 17 and within` the hollow jaw`13 is a grooved pulley 27 around which passesa belt 28 and' said beltengages a grooved pulley 29 thatfis secured on the shaft ofthe motor15`.

The unit assembly comprising the tubular member 217,' the tubularmember 22 and the drill'24 provides simple and eiiicient means for drilling and co'untersinking the brake lining andfor smoothingand nishing the surface of the brake lining immediately adjacent to the edge of the countersink.

Removably seated in the outer end of jaw 14 is a vertically disposed shank 30 and removably positioned inthe lower end thereo-f f shank 3G'isv ai plunger 33, the lower end of Y which bears on the outer upper portion of a leveri34 and which latter is fulcruined on a bracket 35` that projects downwardlyfrom v jaw 13.

Pivotally connected to the rear end of the lever 34 is the upper endof a rod 35 and the lower end thereof is pivotallyconnected to a foot lever 36 and the latter being fulcrumed on base 10.

Secured tothe lower,portion of rod 35 is one end of a retractilespring 37, the upper end'of which is`secured 4to standard'll and saidV spring maintains lever 36 and rod 35 at their upper limits of movement, as illustrated in Fig. 1.

Detacliablyl secured to the upper end of shank'3'0 'is a forwardly' projecting arm 38 and detachably secured to theV forward end of said arm is a vertically disposed rod 40, on the lower end of which is mounted a resilieiitly bendable and swingable inger 41 that isformed of tightly wound spring wire.

4Seated lin the lower end of the resiliently bendable and swingable nger 41 is a pin 42 that occupies a position a short distance. above and in direct vertical alignment with the drill 24. This flexible member 41 and pin 42 provide fa finder or vpointer to assist the operator'in properly locating the brake band and its lining when the latter is to be drilled and countersunk and as the iinger'41 is resilient, itwill not only swingably bend and" yield or flex when engaged by the brake band or shoe of the channel, such, for instance, the shoe S', as shown in the dotted lines in Fi O- ure 1, and is being drilled and countersun,

but also automatically through its inherent i resiliency returns to its normal vertical position as indicated in full lines inFigure 1.

VIn the operation of my improved brake relining machine, a brake band or shoe with the lining positioned against the underface there` of` is positioned directly Vabove the drilling and countersinking iin-it and 'in order that the lining may be drilled and countersunk at the proper points or in registration withthe rivet holes in the band or shoe, the' brake band is positioned so that one o-f the rivet apertures 'is directly beneath the pint41.

'The brake band with-.its lining isfnow moved directly downward and the combined drill and countersinking tool will engage the 35 lining beneath the aperture in the brake band so that drill 24 passes through the lining and through the rivet hole in the shoe and the teeth 23 on the upper end of' member 22 will cut into the brake lining around the drill hole therein, thereby providing the desired countersink.

Simultaneous with this operation the rounded upper ends of the teeth 21 on member 17 will engage the outer face of the brake lining adjacent to the countersink, thereby ironing the same so as to produce a smooth finished surface and the brake band with the drilled end countersunk aperture is now withdrawn from the drill and associated parts and moved so as to bring another one of therivet holes in the brake band into position beneath the guide finger 42 and the drilling and countersinlring operations are repeated.

The tubular member 22 may be adjusted vertically in the upper end of tubular member 17 so as to regulate the depth of the countersink formed around the drill hole in the brake lining and said member 22 and the drill 24 are both firmly secured in their adjusted positions by means of setscrew 26.

After the brake lining has been drilled and countersunk as just described, rivets are inserted through the drill holes in the brake lining and the registering rivet holes in the brake band with the heads of said rivets occupying the countersunk portions of the apertures inthe lining, as illustrated in F ig. 5, and the brake band is now positioned so that the head of a rivet is positioned on the upper end of plunger 33.

Lever 36 is now moved downwardly, thereby actuating lever 34 so as to elevate plunger 33 and the split or tubular end of the rivet will engage the lower end of pin 32 and be upset and thereby firmly secure the brake lining to the brake band or shoe.

Thus, it will be seen that I have provided a relatively simple, practical and inexpensive machine that may be conveniently and economically employed for the comparatively rapid drilling, countersinlring and riveting operations incident to the securing of linings to brake bands and shoes. Y

rIhe resilient guide or finger 41 is of extreme importance. Take for illustration Figures 1 and 2 and prior to an actual boring operation. The operator would hold the brake lining relative to the band and so that the marginal edges thereof would parallel. It is necessary if the band already has openings therein, previously made and from which the old rivets have been removed, to again use the same openings in the band. The proper positioning of the drill to make an opening in the brake lining would be especially difficult with channel shaped shoes, were it not for the resilient pointer 41. An operator only need lower the resilient pointer to a position directly above the band so that the pointer portion 42 would overlie the opening in the-band, whereupon the drilling operation would occur and the drill would come through the opening in said band. If the finger was not present,`it will be readily appreciated how difficult it would be to drill through the lining blindly and trust upon finding the opening in the band. On the `other hand, the drilling might bedonein a reverse order b ut this'is sometimes difficult of accomplishment, because the operator would have to stoop and look up under and at the band to see that the drill was entering the opening already formed in the band.

In the case of the ordinary type of' segmen-V ing in the brake shoe and the operator onlyv needs to hold the lining in position and apply the power to rotate the drill to be assured that the drill will come through an opening already Jformed in the shoe, the finger 41 automatically, as I have described, and without other manipulation, permitting proper placement of the shoe and then taking its normal pointing position within the channel of the shoe. Quite obviously, it is essential to provide numerous openings in the lining in order that itmay be properly riveted to the shoe and the pointer 41, due to its resiliently bendable and swingable properties,

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readily permits the shoe to be moved to different positions in order that the lining may be bored. It is evident that, were the pointer 41 rigid, it would be necessary to elevate and then lower the pointer at each drilling insertion of the shoe, all such manipulations being, however, totally eliminated in the use and operation of the present bendable and swingaible and yet resilient pointer 41. If the pointer was not resilient but relatively stiff, it would be necessary to lift the pointer upwardly and allow it to drop downwardly at each operation.

It is obvious that various changes and modifications and variations may be made in practicing the invention in departure from the particular showing of' the drawing without departing from the true spirit of the invention, as defined by the scope of the appended claims.

I claim as my invention 1. In a brake relining machine, in combination with a drilling tool, a finger depending in spaced axial aligning registration with the tool, and a pointer tip carried axially by said finger, the finger being constructed of coiled wire and being readily bendable and swingable relatively to the tool and resilient tov return to the axial aligning registration.

- '2. In a, brake relining machine, a combination Witlira, drilling tool7 of a, rod disposed in spaced axial aligning registration With the tool, a nger constructed of a, tightly coiled Wire` carried by and depending -from the rod, vand a pointer tip carried at the free end of said linger and normally disposed in spaced axial alignment With the tool.

In testimony whereof I x my signature.

HARRY B. BARRETT'. 

